Removed fallback for lm_head op

[PenghuiCheng]

Type of Change

feature No API changed

Description

Removed fallback of lm_head op for WOQ

Expected Behavior & Potential Risk

Don't fallback lm_head when weight-only quantization.

How has this PR been tested?

Local tested

[github-actions[bot]]

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🟢 Format Scan Tests workflow

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